Machine for treating webs of fabrics in the open state



July 14, 1931. H. KARRER MACHINE FOR TREATING WEBS OF FABRICS IN THE OPEN STATE Filed July 9. 1930 2 Sheets-Sheet 1 H. KARRER July 14, 1931.

MACHINE FOR TREATING WEBS OF FABRICS IN THE OPEN STATE Filed July 9, 1930. 2 Sheets-Sheet 2 Patented July 14, 1931 UNITED sures PATENT QFFICE I ens 543: 333; 0F

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The present invention relates to improve ments in machines for treating webs of fablies in the open state, i. e. for bleaching, dye ing, washing fabrics during their Winding over from one drum to another. In machines of this type itis known to provide each of the winding drums of the machine with a bar which is linked to the drum'and held within a longitudinal groove formed in the drum surface, when in inoperative position, by the windings of the web on the drum and which at the end of the off-winding period is released to actuate the reversing gear. In most cases this bar serves at the same time for holding the ends of the fabric, and the latter is apt to he tornwhen disturbances arise in the operationof the machine; moreover this bar is often the cause of impressions or staining of the goods. Furthermore a bar extending over the whole length of a drum has a considerable mass so thatit requires a on.- siderable force in order to hold it in its inoperative position and the bar may cause distortions of the structure of the fabric or even damaging of the same.

, It is now one of the objects 'of the present invention tocovercome this drawback in as much as on the end of; every winding drum a short bar is provided which is only linked to one end of the drum and which is depressed into a recess provided in the end-portion of the drum by the end portion of the web held by adhesion on the'drum 'orby a tension rope or 1211c like fixedto the edge of an auxiliary we 1 Owing to this arrangement the mass of the bar is so small that it does not cause any of the difficulties known withthe long bars and the longitudinal groove for the bar is done away with so that the drum has a'continuous smooth cylindrical surface with the exception of a small recess for the short bar near the end of the drum.

In niachinesfor treating webs of fabrics in the open state it is of importance to have a uniform speed of the-web passing the liquid and to run the machine at ahigh speed to get a correspondingly high output, whilst a uniform speed only ensures, for instance, a uniform dyeing effect. In order to permit the iees dand in Germany July 20, 1929."

use of the automatic reversing devic f rming ne ofthe objects of the'present invention the web is approximately 3.0 times ash gh as the speed of the web' at the beginning of; the windingoperation. An automatic reversing at such a high speed without injuring the fabric is practically impossible, it vmuld therefore be necessary to'run the machine at such a low. speed. that damage s pre nte the output of such a machine would, h wever, e ery small.- jcct of the present invention to produce a drive for machines of the type described having mbination of the reversing gear and of dif r ntial me hanism. '7 A constru tional example. f the machine ac o ding to the present inventionis illus trated on the accompanyingdrawings, in which 1 e 7 Figs. show means and 4 Figs- 5- -1O show the-machine and its; drive. In particular e t i Fig. 1 shows in a perspective view the reversing means fitted to a winding drum Fig. 2 is a longitudinal seetion'through the reversing means, Y

Figsand 4 arecr'oss-sections with the parts in two different working positions,

Fig. 5' is an end view of the machine seen towards the driving side,

Fig. 6 isa side view of the driving side of the machine, T p

Fig.7 is a. vertical section along lineVII.. VIIinFigat),

Fig. 8 is a vertical section along line VIII VIII in'Fig. 9,

Fig. 9 is ahorizontal section along'line IX''IX in Fig. 5,and

Fig. 10 isa vertical section along line in Fig. 5. i "Referringnow to the drawings the-two winding drums W are rotatably mounted in the machine frame 19, part of which supports the vat 11) are provided over which the web of fa ric details of the reversing It is therefore another ob.

In the latter guide rollers 12- passes on being wound from one drum to the other. The gudgeons Z of the winding drums are driven from an electric motor 13 through the intermediary of gear wheels 14, 15 and shaft 16. On the latter the part 17 of a friction clutch is axially displaceable but prevented from turning relatively to the shaft 16. In its extreme left hand position the part 17 is in engagement with the clutch element of the gear wheel 18 loosely mounted on the shaft 16 and meshing with the toothed ring 19 of the difierential mechanism; in its extreme right hand position the part 17 is in driving engagement with the clutch element of the gear wheel 20, which by way of the reversing wheel 21 is in operative engagement with the toothed rim 22 of the differential mechanism. The latter comprises two pairs of bevel wheels 23, 24 in mesh with each other; each of the bevel wheels 23 is mounted on a shaft 25, the bevel wheel 26 on which meshes with abevel wheel 27 fitted to each of the drum gudgeons Z. Brakes 28 having free-wheel devices 28 are provided to alternately act on that of the two drum gudgeons Z, supporting the drum from which the fabric is wound off for the time being; hand wheels 29 serve for adjusting the brakes. On reversing the other drum is automatically braked by the action of the free wheel mechanism. The differential mechanism permits an automatic adjustment between the speeds of the two drums.

-The axial displacement of the friction clutch member 17 for reversing the speed of the drums W is effected by means of a fork 30 fixed to a shaft 31 on which a V-shaped two armed lever 32 is fixed. At the ends of the two arms of the lever 32 two-armed levers 33 are turnably mounted, which carry at their outer ends rollers 34 and the inner ends of which are connected together by a coil spring 35. The rollers 34 cooperate with cam disks 36 fixed to the gudgeons Z and a spring loaded member 37 secures the lever 32 in any of its two extreme positions. The whole drive is completely enclosed ina casing 38 forming part of the frame 10 and is accessible by a cover 39. Thereby all the parts of the drive are protected against the corrosive action of splashes of the solutions used in the vat.

The means for automatically efiecting the reversing comprise in their simplest form a short rod, having a length of a few centimetres which is linked to one end of the winding drums and is pressed into a recess of the winding drum by the edge of the fabric, whilst an auxiliary web, to which the fabric is connected and which is somewhat smaller in width than the fabric and does not cover the rod is so often placed around the smooth drums that the adhesion prevents the wet auxiliary web from slipping. A separate clamping rod is rendered superfluous and smooth surface with the exception of the short recess for the reversing rod.

If on the same machine webs of fabrics of varying width have to be treated, the width of which is so small that it does not suffice to hold the reversing rod in its recess the arrangement illustrated in Figs. 14 may advantageously be used.

On one of the gudgeons or shaft Z of the winding drum WV a disk 1 is non-rotatably fixed. To the front end of this disk a double armed lever 3 is turnable about a pin 2, the bent arm 3a of which carries the short reversing rod 4 whilst the other arm 3?) is constructed as a pawl. Laterally of the disk 1 a sleeve 6 is rotatably mounted on the gudgeon Z and is provided with a cam 6a with which the pawl 31; cooperates when the lever 3 is angularly displaced from its position illustrated in Fig. 3 for winding the fabric on or off into the operative position shown in Figs. 1 and 4. During the winding on or OK the rod 4 rests in the recess 1?).

An adjusting ring 5 rotatably mounted on the nave of the disk 1 is provided with an abutment facing 5a and with a projection 56 serving as a handle. WVhen this ring is manually turned into the position shown in Fig. 3 the facing 5a is placed below the pawl 31) and prevents thereby a swinging motion of the double-armed lever 3, for instance when the fabric is wound on for the first time. The adjusting ring 5 is fixed in its two extreme positions by a. spring loaded ball 9 mounted in the projection 51), the ball 9 entering recesses 9a of the disk 1. The sleeve 6 is further provided with the cam 36 described above and illustrated in Figs. 7and 9.

Near the reversing rod 4 the disk 1 is provided at its circumference with a recess 10 in which the end knot 7 of a rope 8 is inserted. The other end of the rope 8 is fixed to the edge of the auxiliary web V which is placed in several windings on the winding drum W so that it is held thereon by adhesion. When the auxiliary web V is completely wound on the drum, the rope 8 is wound around the disk and on the end portion of the drum and presses thereby the reversing rod into the recess 1?) As soon as the fabric has been wound on the other drum the rope is unwound from the first drum and releases the reversing rod 4, whereupon the pawl 35 abuts against the cam 5a and causes a turning motion of the sleeve 5 and thereby of the cam 36 which operates the reversing mechanism.

The provision of the differential mechanism ensures a uniform speed of the web in spite of the increasing diameter of the batch roller on-which the winding on occurs and the decreasing diameter of the batch roller which is wound off. The tension of the web may be adjusted by means of the band brake the winding drums may have a completely and the above described device act so smoothly that the reversing occurs without any shock nor any undue strain of the fabric.

I claim:

1. In a machine for treating webs of fabric in the open state, in combination, a vat, winding drums and guide rollers in the vat, a driving mechanism for the drums including a sectional shaft and a differential mechanism, a reversing gear in said driving mechanism, a short rod rotatably mounted on one end of each winding drum and housed in a recess of the drum in its inoperative position and means influenced by said rod for actuating said reversing mechanism when the rod is permitted to leave its recess.

2. In a machine for treating webs of fabric in the open state, in combination, a vat, winding drums and guide rollers in the vat, a driving mechanism for the drums including a sectional shaft and a differential mechanism, a reversing gear in said driving mechanism, a disk provided at the end facing of every winding drum, a double armed lever fulcrumed on said disk, a short rod fixed to one arm of said two-armed lever and housed in a recess of the drum in its inoperative position, a pawl carried by the other arm of said lever, a sleeve adapted to turn relatively to said drum and provided. with a cam for cooperation with said pawl, and a further cam on said sleeve adapted to influence said reversing mechanism when said rod is permitted to leave its recess.

3. In a machine for treating webs of fabric in the open state, in combination, a vat, winding drums and guide rollers in the vat, a driving mechanism for the drums includ ing a sectional shaft and a differential mechanism, a reversing gear in said driving mechanism, a casing in which the whole of the driving mechanism is enclosed and protected in a splash-proof manner, a disk provided at the end facing of every winding drum, a. double armed lever fulcrumed on said disk, a short rod fixed to one arm of said two-armed lever and housed in a recess of the drumin its inoperative position, a pawl carried by the other arm of said lever, a sleeve adapted to turn relatively to said drum and provided with a cam for cooperation with said pawl, and a further cam on said sleeve adapted to influence said reversing mechanism when said rod is permitted to leave its recess.

4. In a machine for treating webs of fabric in the open state, in combination, a vat, winding drums and guide rollers in the vat, a driving mechanism for the drums including a sectional shaft and a differential mechanism, a reversing gear in said driving mechanism, a disk provided at the end facing of every winding drum, a double armed lever fulcrumed on said disk, a short rod fixed to one arm of said two-armed lever and housed in a recess of the drum in its inoperative position, a pawl carried by the other arm of said lever, a sleeve'adapted to turn relatively to said drum and provided with a cam for cooperation with said pawl, a further cam on said sleeve adapted to influence said reversing mechanism when said rod is permitted to leave its recess, and an adjusting ring loosely mounted on said disk and provided with an abutment facing for depressing said pawl.

5. In a machine for treating webs of fabric in the open state, in combination, a vat, winding drums and guide rollers in the vat, an auxiliary web wound around said winding drums and held thereon by adhesion, the fabric being fixed to-said auxiliary web, a rope fixed with one end to the drum and with its other end to the edge of said auxiliary web, a driving mechanism for the drums including-asectional shaft and a differential mechanism, a reversing gear in said driving mechanism, ashort rod rotatably mounted on one end of each winding drum and held in a recess of the drum by the rope being wound on the outer portion of said drum,

and means influenced by said rod for actuating said reversing mechanism when the rod 1s permitted to leave its recess.

In testimony whereof I have signed my name to this specification.

HANS KARRER. 

